Clean up test makefiles.

The build system takes care of linking the correct STL and gtest
libraries for you, and specifying them manually confuses the build
system when using libc++.

Change-Id: I6ac66c2f4e97cd3c55efb7a85e10922420554e7f
diff --git a/camera/tests/Android.mk b/camera/tests/Android.mk
index ec13911..a806e31 100644
--- a/camera/tests/Android.mk
+++ b/camera/tests/Android.mk
@@ -1,14 +1,13 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
+LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_SRC_FILES:= \
-	main.cpp \
 	ProCameraTests.cpp \
 
 LOCAL_SHARED_LIBRARIES := \
 	libutils \
 	libcutils \
-	libstlport \
 	libcamera_metadata \
 	libcamera_client \
 	libgui \
@@ -17,14 +16,7 @@
 	libdl \
 	libbinder
 
-LOCAL_STATIC_LIBRARIES := \
-	libgtest
-
 LOCAL_C_INCLUDES += \
-	bionic \
-	bionic/libstdc++/include \
-	external/gtest/include \
-	external/stlport/stlport \
 	system/media/camera/include \
 	frameworks/av/services/camera/libcameraservice \
 	frameworks/av/include/camera \